Crusher



Sept. 2, 1941. A. w. FAHRENWALD' 2,254,425

CRUSHER Filed May 28, 3958 ARTHUR W. FAHREAVWAL D (Ittomeg PatentedSept. 2, 1941 om'rE-o- STATES? one-snare W h U 7 Arthur W. Fahrenwald,Moscow, Idaho; Application May 2 1938, Serial o l-210x155 3 Claims,(o 1. ss--1o)- The prima obiect of the inven ion is prove crushers of.this time in, certain respects toin'sure a simple construction, stablity and durability of parts, and smooth operation of the gyratorycrushing unit, Anjadit zone for c ar material and an exit. zone for thefiner material are provided between the. gyratory head and h stationaryconcave, and means are. provided for accurately and convenientlyadjusting the concave with relation to the gyratoryhead,;in order thatthe crushing capacity of the adit zone and at. of the exit zone maybeequalized to..- insur uniform feed and passage of the 'material throughthe crushing mill.

To insurea maximum degree of stability for the floating gyratory unit along-bearing extending substantially'the length of the, central spindie,is provided and in which the eccentric sleeve is journaled with, thespindle, and the latter is laterally braced and supported so. that thegyrating head may have an efieetive, rolling contact with the materialto be, crushed,

Due tothe combination and arrangement of parts of the gyrating unitmeans are provided for freely lubricating the parts against. wear andforconstantly circulating the lubricant or oil in con tact with thebearings, of working parts.

The invention consists in certain. novel c,ombi-' nations andarrangements-of parts as willhereinafter he more fully set forth andclaimed. In the accomp nying drawing I have illustrated one completeexample of the physical embodiment of my invention wherein the parts.are combined and arranged according to one mode I, have thus far devisedfor the practical application of the prini ciples of. my

invention. It will be und rstood that changes and alterations may bemade in these exemplifying structures, within the scope of my appendedclaims, without departing from the principles of my invention.

Figure l is a vertical sectional view of, a crushing mill embodying myinvention.

figure 2 is a view in side. elevation of the gymtory crusher with itsintegral spindle and floating base plate or disk.

. Figure 3 is a'horizontal sectionalview through the frame of themachine, thebearing sleeve, the

eccentric bushing and the spindle, and showing also the driving gearsfor the eccentric bush- In the assembly view Figure 1 it Willbe seenthat the base I is fashioned. with, integral uprightcylindrical frame z,and; an inner concentrically spaced shell 3, and in Figure 3 spaces 4,4, are provided between the frame and the shell for the discharge of thecrushed material. At the upper end of the cylindrical frame, acylindrical head 5 is provided, and this head is threaded at 5 on theexterior of the cylindrical frame 2 to an approximate adjustment for theframe in position for use.

may readily be made, and partsmay. with facility be removed for repairsor replacements, by

and the frame-head. The frame-head is accurately and preciselypadiustedon; the frame through the, use of a series'of adjusting'bolts 6 that arethreaded through bolt holes in the annular top flange 6' of theframe-head, with their lower ends bearing on the top edgeof the frame 2.Through the use of the threads 5' and the ad'- justing bolts 6, theframe-head is properly adjustecl', and then the bolts 6 are locked inplace by means of lock nuts 1 on the bolts turned up tight againstthebottom face of the flange 6.

The frame-head is also provided with aniliner annular flange 8 dependingwithin the frame-head and spaced concentrically therewith, and thisdepending flange is fashioned with a tapered face to receive the concave9 which forms the stationary jaw of the crusher. As indicated in Figure.1 the. concave fashioned with an upper tapered sloping face 10 and alower outwardly flaring tapered slope H, and these sloping faces orstationary jaws, together with the gyratory crushing head, form an adit'zone. fOr the reception of coarse material, and an exit zone for thedischarge of the crushed or finer material, the coarse material beingfed to. the

edit zone through a circular collar 2 that projects upwardly from, theconcave and oo-acts with a suitable hopper for feedingthe material tothe mill.

, 'I' econcave is adjusted and rigidly suspended in the, frame-head, andit is, retained in place through means that are readily accessible andmay be manipulated with facility. For this purpose a series of holes [3are provided in the collar I2 of the concave, and. radial locking leversM are disposed aboutjthe, concave. with. their inner ends protruding.into or through the holes. The levers are supported. on fll cllln'lsv l5located on the top edge of the flange, 8 of the. framehead,. andverticallocking'bolts is. are passed through holes inthe flange B andcomplementary holes in the outer ends; of the levers, The bolts areentered up through the flange-holes with their heads l'l bearing againstthe underface of the flange, and tightening or look nuts iii, are

threaded on the ends of the bolts as they protrude throughthje leverholes. Thusby turning home the nuts on the bolts the concave is drawn upinto position in the flange S-and rigidly seated Repairs or replacementsloosening the nuts and withdrawing the supporting levers. r ll Thefloating gyratoryis; mountedcent-rally of, and below the concave, and as.Seen in Figures 2 and 3, the fr'usto-conical crusher-head i9 isfashioned with an integral spindle having two journals 2!] and 2| ofdiffering diameters the heavier or larger journal 20 integral with thehead, and the other'journal being materially reduced in diameter. On theface of the frustoconical head is mounted a complementary wearmantle 22secured to the head by means of a crown-bolt 23,.and the working face ofthe mantle is stepped to form'concentric annular bands as 24, and stepsbetween the bands. The crusher head has a rolling contact with thematerial in vent choking in both the adit zone. and the exit zone. Thusthe coarse material fed to theadit zone is successively crushed to afiner size as it A passes through the two zones, and the fine-seventually are discharged through the vertical channels or spaces 4 ofthe frame.

At its lower end} the spindleis provided with a floating foot-platefor.disk25 having a socket 26 mounted'on a reduced end. 21 of the spindleas shown indotted lines. The disk is fashioned with a semi-sphericallower face, the curve of which is struck from" a' center located abovethe crown of the gyratory crushing head, and this face rides orgy'iatesqwitha floating movement over a complementary concave face inthe base or bearing plate '28 that is located at the bottom of the mainframe and boltedat 29 to the base I of the framef I. Y

'The'locus of radii'of the spherical thrust bearing ma's coincide withthe center of gyration or neutral point of the spindle and it may or maynot be at the apex of the gyrating'cone. That is, it may be somewhatabove for below this point but generally it should be nearly on the apexof said cone. 1

The spindleis supported in a bearing sleeve 30 havinga lateral flange 3|that is rigidly bolted on the top edge'of the shell'2, and a housing 32,exterior of the 'fsleeve is provided with a bottom flange 33' that isseated in a complementary groove in the top face of the'flange'3l thehousing being designed as a dust-guard to prevent access of dust to thelubricated parts of the gyrating unit.

The housing 32 serves also" to collect the lubricating oil pumped upbetween the bearing sleeve 30'and 34 and between 341andthe spindlehousing 32 'andlserves to catch the oil thus pumped and return itthrough ports opening into' the oil well49.

' Within the bearingsleeve is journaled a rotary bushing 34 havingtwo'eccentric, bores 35 and 36 complementary to 'theitwodiameters of the'spindlethat is" encasedby'the bushing, and a usual liner 3'! isinterposedbetween the bushing 'andthe bearing sleeve;

At its lower end, just below the l'oweren'diof the bearing sleeve, thebushing is fashioned with an exterior flange 38 which is'bolted to ahorizontally disposed gearing or gear ring 39,' and this ring restsupona bearing plate.or gasket 40 that is seated on the bottom bearingring that supports the bearing member 'or bushing of the spindle.1'Thebottom bearing, 4|, as shown is bolted to'the base of thejframe by bolts29, and this bearing: ring, which overhangs the fi oatingjbase plate ordisk 25, forms a support at the lower end for the-eccentric bushing'With'the spindle free to revolve or "rotate in the bushing as itpartakes of the gyratory movement created by the rotating eccentricbushing. j fj f l The driving mechanism-forthe crusherincludesa'pinion-42 in'mesh with thegear ring 39, and

drive the gyratory crusher unit:-

Lubricating oil under pressure is supplied the adit and exit zones, andthese steps retard 1 through the inlet pipe 48 to the oil well 49 in thedownward movement of the material to pre which the floating disk 25gyrates, and by means of vertical and lateral oil ducts as 50 thelubricating oil'is'circulated through and around the journalbearings,and into the oil chamber 5| in which the gear' ring and pinion areenclosed. An outlet pipe 52 from th oil chamber 5| disposes of theusedoil in suitable manner.

From the above'descriptiontaken in connection with 'the'drawingtheconstruction and operation of the crusher will be apparent, and theadvantages of the compactly arranged, easily adjusted parts,togethei-With'the lateral bracing of the gyratory unit will also be,clear.

' Having thus'jfully described my invention, what lcljaim asfnewandj'desire'to secure by Letters Patent isz' '3 I 1. In a crushing mill,the combination with a main frame, having" an inner shell, and anupri'ghtflbearin'g sleevemounted on and projecting above and below thetop of the shell, of a rotary bushing mounted and extending the fulllength of the sleeve, sai'dbushing having two bores of differingdiameters eccentrically arranged therein," a spindle journaled intheeccentric bores, and

having a crushing head integral therewith, a spherical convex lbearingdismmounted on the lower end' of 'fthe."spindle, and'having a center ofcurvature adjacentjthe neutral point of. the

spindle and aboveithe crushing head, a, bearing support "for the disc,and means for revolving the bushing. I

' 2. In a crushingmill, the combination of a main frame, an inner frameshell'having a supporting flange, a centrally disposed bearing sleevehavingan exterior fian'gem'ounted on said sup- 'sleeve, a bushing having' an eccentric bore and journaled in'said sleeve, said bushinghaving a ring gearrigid with its lower, end below the 'sleeve',a"bearing ring 'mou'nted in the frame to support said ring gear, a drivepinion engaging said ring gear andincluding means for rotating same, aspindle journaled in'theeccentric bore and having a crushing headintegral therewith,

"a spherical convex bearing disc mounted on the lower end of the spindleand having a center of curvature adjacentthe'neutral point of thespindle and above-the crushing-head, and a complementaryisphericalconcave bearing support for ddi n

